If he can't speak in a debate without offending people, how will he handle the rest of the world leaders? He came of as saying a big portion of the gun violence comes from single parents. Look at the big shootings in Aurora and Ft Hood, hell even Kazynski. Did they come from single parent families?
Even the problems from low income violence don't necessarily come from single families, but the environment and economic situation surrounding them. Having two parents won't magically change that. Is it a bad thing? No, obviously having a good family life with both parents will go a long way towards keeping kids out of trouble and gangs. Comments like that just make it look like he doesn't really understand whats going on and wants to blame lifestyles he doesn't approve of.
If he meant a better home life, he should have just said that. Instead he said we need more traditional marriage homes, because they're always better.